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Acorn Energy, Inc., together with its subsidiaries, develops and markets wireless remote monitoring and control systems for various markets in the United States and internationally. It operates in two segments, Power Generation (PG) Monitoring and Cathodic Protection (CP) Monitoring. The PG segment provides wireless remote monitoring and control systems, and services for critical assets, which include stand-by power generators, pumps, pumpjacks, light towers, turbines, compressors, fire pumps, and other industrial equipment; and Internet of Things applications. The CP segment offers remote monitoring and control products for cathodic protection systems utilized in gas pipelines for gas utilities market and pipeline operators. The company was incorporated in 1986 and is based in Wilmington, Delaware.

Ecology & Environment, Inc., an environmental consulting firm, provides professional services to government and private clients worldwide. It offers support services for response and site assessment activities related to the release and threat of release of oil, petroleum products, hazardous substances, and weapons of mass destruction or pollutants or contaminants; and undertakes task order contracts comprising various environmental assessment projects, engineering and oversight of pollution remediation, and other hazardous waste remediation activities, as well as prepares environmental impact assessment documents for federal land management agencies. The company also provides services to various phases of energy development by conducting critical feature/fatal flaw analyses, social and health impact assessments, feasibility and siting studies, field surveys, permitting, construction inspection, and compliance monitoring. In addition, it conceives and designs environmental restoration projects that restore affected habitat through the integration of biological and engineering solutions; offers sustainability, resiliency, and climate adaptation services, as well as environmental planning and assessment, and military master planning and land use compatibility study services; and provides water supply, water quality, and watershed management services. Further, the company offers logistical support, emergency response/management, and planning services in various preparedness, mitigation, response, and recovery phases, as well as conducts hazardous waste site evaluations providing site investigation, engineering design, and operation and maintenance. Additionally, it is involved in the management and financial planning; institutional strengthening and standards development; water supply and development; wastewater treatment; and solid waste project construction supervision assignments. The company was founded in 1970 and is headquartered in Lancaster, New York.

Engility Holdings, Inc., together with its subsidiaries, provides a range of technical services to the U.S. Department of Defense, U.S. Department of Justice, U.S. Department of State, Federal Aviation Administration, Department of Homeland Security, and space-related and intelligence community agencies. It offers systems engineering and integration services, including engineering and technology lifecycle support, information assurance, modeling and simulation, and architecture analysis and modernization; and cybersecurity services, such as vulnerability assessments and penetration testing, independent test and evaluation, cybersecurity systems engineering, cyber quick reaction range capability, and cyber hunting. The company also provides high performance computing services comprising architecture and infrastructure design, data management and analytics, and integration and testing, as well as systems operation, optimization, and sustainment; and enterprise modernization services, which include architecture analysis and modernization, information technology services and solutions, and software development and integration. In addition, it offers mission and operations support solutions in the areas of artificial intelligence, space launch and space flight, law enforcement, intelligence analysis, air traffic management, engineering and fabrication, and communication data exchange; and readiness and training solutions, including training development, learning, and knowledge management. The company was incorporated in 2012 and is based in Chantilly, Virginia. Engility Holdings, Inc. is a subsidiary of Birch Partners, LP.

ENGlobal Corporation provides engineering and professional project execution services primarily to the energy sector in the United States and internationally. It operates in two segments, Commercial and Government Services. The Commercial segment provides multi-disciplined engineering services and fabrication relating to the development, management, and execution of projects requiring professional engineering and related project management services. It offers conceptual studies, project definition, cost estimating, engineering design, environmental compliance, material procurement, project management, construction management, and fabrication services. The Government Services segment provides design, integration and implementation of process distributed control and analyzer systems, advanced automated data gathering systems, information technology, and the maintenance of these systems; and electrical and instrument installation, technical services, ongoing maintenance, calibration, and repair services. It also provides services related to the engineering, design, installation, and maintenance of automated fuel handling and tank gauging systems for the United States military. The company serves Fortune 500 companies in the energy industry and the United States government. The company was formerly known as Industrial Data Systems Corporation and changed its name to ENGlobal Corporation in June 2002. ENGlobal Corporation was founded in 1985 and is headquartered in Houston, Texas.